Look right about the Reply button.... there's a yingyang symbol that says karma. When you click on somones yingyang, you can give them good or bad karma for their posts.
Any question concerning karma are usually locked, they become karma thread, where members exchange karma to raise their personal karma numbers. Karma is part of a defunct system that was meant to seperate good/useful members from members that were negitive/troublesome. Well, people started to "whore" the karma and the system was rendered useless. I, myself being one of the biggest culprits of this violation, have made a name for myself when it come to karma. I know it's an electronic green dot, but I have met and made many friends here because of karma, so I guess in a sick way has served a purpose.